Electronic device with in-pocket audio transducer adjustment and corresponding methods

ABSTRACT

An electronic device includes one or more microphones, one or more sensors, and one or more processors operable with the one or more microphones and the one or more sensors. The one or more processors, upon the one or more sensors detecting the electronic device is disposed within a repository container, such as a pocket, apply an audio signal adjustment function to signals received from the one or more microphones, thereby mitigating noise in the signals caused by the repository container.

BACKGROUND Technical Field

This disclosure relates generally to electronic devices, and moreparticularly to electronic devices having audio transducers.

Background Art

Modern portable electronic communication devices including numerousfeatures beyond those associated with simply making voice telephonecalls. Smartphones, for example, can be used to send text messages ormultimedia messages, capture videos, make financial transactions, andsurf the Internet. A modern smartphone places more computing power in apocket than was offered by large desktop computers of only a decade ago.

As the technology of these devices has advanced, so too has theirfeature set. For example, not too long ago all electronic devices hadphysical keypads. Today touch sensitive displays are more frequentlyseen as user interface devices. Similarly, it used to be that the onlyway to deliver user input to a device was with touch, either through akeypad or touch sensitive display. Today some devices are equipped withvoice recognition that allows a user to speak commands to a deviceinstead of typing them.

These smaller, yet more powerful, devices are being used for manydifferent applications in many different environments. It would beadvantageous to be able to detect certain environments and adaptperformance of an electronic device to better perform in a givenenvironment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates one explanatory electronic device and correspondingmethod in accordance with one or more embodiments of the disclosure.

FIG. 2 illustrates one explanatory electronic device in accordance withone or more embodiments of the disclosure.

FIG. 3 illustrates one or more explanatory sensors in accordance withone or more embodiments of the disclosure.

FIG. 4 illustrates one or more explanatory method steps in accordancewith one or more embodiments of the disclosure.

FIG. 5 illustrates one explanatory method in accordance with one or moreembodiments of the disclosure.

FIG. 6 illustrates one or more method steps in accordance with one ormore embodiments of the disclosure.

FIG. 7 illustrates one or more method steps in accordance with one ormore embodiments of the disclosure.

FIG. 8 illustrates one or more method steps in accordance with one ormore embodiments of the disclosure.

FIG. 9 illustrates one or more method steps in accordance with one ormore embodiments of the disclosure.

FIG. 10 illustrates explanatory audio signal adjustment functions inaccordance with one or more embodiments of the disclosure.

FIG. 11 illustrates various embodiments of the disclosure.

Skilled artisans will appreciate that elements in the figures areillustrated for simplicity and clarity and have not necessarily beendrawn to scale. For example, the dimensions of some of the elements inthe figures may be exaggerated relative to other elements to help toimprove understanding of embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE DRAWINGS

Before describing in detail embodiments that are in accordance with thepresent disclosure, it should be observed that the embodiments resideprimarily in combinations of method steps and apparatus componentsrelated to the application of audio signal adjustment functions to oneor more audio transducers of an electronic device when that electronicdevice is in an enclosed condition, such as in a pocket, purse, or otherenclosed space. Any process descriptions or blocks in flow charts shouldbe understood as representing modules, segments, or portions of codethat include one or more executable instructions for implementingspecific logical functions or steps in the process. Alternateimplementations are included, and it will be clear that functions may beexecuted out of order from that shown or discussed, includingsubstantially concurrently or in reverse order, depending on thefunctionality involved. Accordingly, the apparatus components and methodsteps have been represented where appropriate by conventional symbols inthe drawings, showing only those specific details that are pertinent tounderstanding the embodiments of the present disclosure so as not toobscure the disclosure with details that will be readily apparent tothose of ordinary skill in the art having the benefit of the descriptionherein.

Embodiments of the disclosure do not recite the implementation of anycommonplace business method aimed at processing business information,nor do they apply a known business process to the particulartechnological environment of the Internet. Moreover, embodiments of thedisclosure do not create or alter contractual relations using genericcomputer functions and conventional network operations. Quite to thecontrary, embodiments of the disclosure employ methods that, whenapplied to electronic device and/or user interface technology, improvethe functioning of the electronic device itself by and improving theoverall user experience to overcome problems specifically arising in therealm of the technology associated with electronic device userinteraction.

It will be appreciated that embodiments of the disclosure describedherein may be comprised of one or more conventional processors andunique stored program instructions that control the one or moreprocessors to implement, in conjunction with certain non-processorcircuits, some, most, or all of the functions of applying audio signaladjustment functions to audio transducers of an electronic device, suchas one or more microphones or one or more loudspeakers, as describedherein. The non-processor circuits may include, but are not limited to,a radio receiver, a radio transmitter, signal drivers, clock circuits,power source circuits, and user input devices. As such, these functionsmay be interpreted as steps of a method to perform audio signaladjustment functions associated with the operation of audio signaltransducers. Alternatively, some or all functions could be implementedby a state machine that has no stored program instructions, or in one ormore application specific integrated circuits (ASICs), in which eachfunction or some combinations of certain of the functions areimplemented as custom logic. Of course, a combination of the twoapproaches could be used. Thus, methods and means for these functionshave been described herein. Further, it is expected that one of ordinaryskill, notwithstanding possibly significant effort and many designchoices motivated by, for example, available time, current technology,and economic considerations, when guided by the concepts and principlesdisclosed herein will be readily capable of generating such softwareinstructions and programs and ICs with minimal experimentation.

Embodiments of the disclosure are now described in detail. Referring tothe drawings, like numbers indicate like parts throughout the views. Asused in the description herein and throughout the claims, the followingterms take the meanings explicitly associated herein, unless the contextclearly dictates otherwise: the meaning of “a,” “an,” and “the” includesplural reference, the meaning of “in” includes “in” and “on.” Relationalterms such as first and second, top and bottom, and the like may be usedsolely to distinguish one entity or action from another entity or actionwithout necessarily requiring or implying any actual such relationshipor order between such entities or actions. As used herein, componentsmay be “operatively coupled” when information can be sent between suchcomponents, even though there may be one or more intermediate orintervening components between, or along the connection path. The terms“substantially” and “about” are used to refer to dimensions,orientations, or alignments inclusive of manufacturing tolerances. Thus,a “substantially orthogonal” angle with a manufacturing tolerance ofplus or minus two degrees would include all angles between 88 and 92,inclusive. Also, reference designators shown herein in parenthesisindicate components shown in a figure other than the one in discussion.For example, talking about a device (10) while discussing FIG. A wouldrefer to an element, 10, shown in figure other than FIG. A.

Embodiments of the disclosure are operable to detect, with one or moresensors of an electronic device, whether the electronic device is in anenclosed condition. Examples of enclosed conditions include situationswhere the electronic device is disposed within a pocket, a purse, abackpack, a drawer, or other enclosed environment. When this occurs, inone or more embodiments one or more processors determine an audio signaladjustment function for one or more audio transducers of the electronicdevice in response to the enclosed condition.

Illustrating by example, consider the situation when the electronicdevice is situated within a pocket with a portion of the electronicdevice exposed from the pocket. Where one or more microphones orloudspeakers are disposed about the perimeter of the electronic device,those that are exposed from the pocket will be better situated toreceive and transmit acoustic energy due to the fact that they areexposed. By contrast, those microphones and/or loudspeakers that arecovered by textile material may have acoustic signals emitted therefromor received thereby muffled, distorted, dampened, altered, or otherwisedegraded.

Advantageously, in one or more embodiments the one or more processorsdetermine an audio signal adjustment function for each audio transduceras a result of the enclosed condition. The one or more processors thenapply the audio signal adjustment function to the one or more audiotransducers while the electronic device is in the enclosed condition.The audio signal adjustment function adjusts performance characteristicssuch as volume, gain, and spectral distribution, by applying amplitudecompensation, spectral equalization, compression, expansion, or othercompensating adjustments to enhance the operation of each microphone orloudspeaker. In short, the application of the audio signal adjustmentfunction allows each microphone to “hear better” in the enclosedcondition. Similarly, the application of the audio signal adjustmentfunction allows each loudspeaker to produce sounds more audible to auser so the user can hear the electronic device better when in theenclosed condition. Advantageously, embodiments of the disclosure enablethe electronic device to better sense audio signals and to bettercommunicate with the user even when in an enclosed condition, such aswhen disposed in a pocket or purse.

In one or more embodiments, when an enclosed condition is detected, oneor more microphones are enabled to sense background acoustic signals.Embodiments of the disclosure contemplate that microphones that arecovered by textile material will receive “rubbing” or “crinkling” noiseor other acoustic energy that is generated when a textile material rubsagainst itself or the electronic device. This results in the receipt ofacoustic signals being restricted. Such rubbing or crinkling noise can,in some situations, overwhelm the audio system. This can prevent or maskvalid audio from being detected by impacted microphones. Consequently,voice recognition and hands free functions may struggle to operateproperly when the electronic device is in an enclosed condition.

Advantageously, embodiments of the disclosure overcome thesedifficulties so that functionality employing the receipt or delivery ofacoustic energy can better receive and deliver acoustic energy when theelectronic device in the enclosed condition. In one embodiment, thisoccurs via a three-step process that includes detecting that theelectronic device is disposed in an enclosed environment such as apocket, a purse, etc., adaptively selecting the microphone receiving theleast “rubbing” or “crinkling” or other acoustic energy that isgenerated when a textile material rubs against itself or the electronicdevice, and then calibrating, via the application of an audio signaladjustment function to overcome amplitude and spectral degradationoccurring as a result of the enclosed condition.

Embodiments of the disclosure contemplate that placement of anelectronic device in a pocket or purse can cause a serious issue inwhich the “rubbing” or “crinkling” or other acoustic energy that isgenerated when a textile material rubs against itself or the electronicdevice can “overwhelm” or saturate microphones of the electronic device.This condition can prevent one or more of the microphones from receivingacoustic energy. Embodiments of the disclosure advantageously, in one ormore embodiments, adaptively selects one or more microphones that areleast impacted by the “rubbing” or “crinkling” or other acoustic energythat is generated when a textile material rubs against itself or theelectronic device.

This selection can occur as a function of microphone location,electronic device orientation, or other factors. Illustrating byexample, if the electronic device is situated within a pocket with aportion of the electronic device exposed from the pocket, in oneembodiment one or more orientation sensors or other sensors wouldidentify the portion of the electronic device exposed from the pocket.This identification could happen via audio analysis or other sensors ora combination of the two. Thereafter, the one or more processors of theelectronic device would select microphone(s) disposed along the exposedportion of the electronic device due to the fact that thesemicrophone(s) would receive less of the “rubbing,” “crinkling,” otheracoustic energy, or attenuation. In other embodiments, processoroperations that monitor the microphones for clipping on each channel todetermine which microphones receive the least “rubbing” or “crinkling”or other acoustic energy, with the microphone selection being based uponthe least clipping. Other techniques for selecting the microphone(s)receiving the least “rubbing” or “crinkling” or other acoustic energywill be obvious to those of ordinary skill in the art having the benefitof this disclosure.

Detection of the enclosed condition can occur in a variety of ways.Using placement of an electronic device in a pocket as an illustrativeexample, in one or more embodiments the electronic device is equippedwith one or more capacitive touch sensors. For example, an electronicdevice can be equipped with a front capacitive touch sensor, a rearcapacitive touch sensor, and one or more side capacitive touch sensors.Using these three sensors, touch—or the lack thereof—can be determinedto define a powerful system that is able to distinguish between, forexample, when the electronic device is disposed within a pocket, isplaced on a surface, or is being grasped by a hand. This system can besupplemented, augmented, or replaced by additional systems, includingthose based upon accelerometer data, light sensing data, “muffled” soundsignals, temperature measurements, and so forth. Many of thesetechniques will be described in the disclosure below. Still others willbe obvious to those of ordinary skill in the art having the benefit ofthis disclosure.

In one or more embodiments, once the enclosed condition is detected, theone or more processors determine the audio signal adjustment function byperforming what is referred to herein as an “acoustic sweep.” In one ormore embodiments, the acoustic sweep is performed by emitting predefinedsignals from one or more loudspeakers of the electronic device andmeasuring an attenuation of those signals as received by one or moremicrophones of the electronic device. Said differently, in oneembodiment the acoustic sweep comprises delivering, from one or moreaudio output devices, a predefined acoustic output to one or moremicrophones and measuring, with one or more processors, attenuation ofthe predefined acoustic output occurring between the one or more audiooutput devices and the one or more microphones. The responsecoefficients can then be used to define the audio signal adjustmentfunction.

These audio sweeps can be performed on a periodic basis. This helps toensure that the audio signal adjustment function is only applied whenthe electronic device is in the enclosed position. In one or moreembodiments, when the enclosed condition ceases, application of theaudio signal adjustment function also ceases. Said differently, in oneor more embodiments, the one or more processors also detect, using oneor more sensors, cessation of the enclosed condition. When this occurs,the one or more processors terminate application of the audio signaladjustment function to the signals received from the one or more audiotransducers.

Application of the audio signal adjustment function works, in one ormore embodiments, to alter one or more of audio gain, spectrumequalization, or transfer function. This enables microphones orloudspeakers to better deliver and receive acoustic energy through thewalls of the container enclosing the electronic device. In one or moreembodiments, the audio signal adjustment function comprises an amplitudecompensation factor for signals received by microphones or delivered byloudspeakers. The amplitude compensation can increase or otherwise altergain to once again allow these devices to receive and deliver acousticenergy, as well as to acoustically overcome sound attenuation due toenclosed condition. In one or more embodiments, the audio signaladjustment function comprises spectral equalization. When audio sweepsare preformed and detect acoustic energy degradation due to an enclosedcondition, a function that is the inverse of the degradation can beapplied. This inverse function applies, in one or more embodiments,correction factors specific to clothes or other containers that mayimpact the received or delivered audio “spectral function.” Of course,the amplitude correction and spectral equalization can be applied incombination as well.

In one or more embodiments, an electronic device comprises one or moremicrophones, one or more sensors, and one or more processors operablewith the one or more microphones and the one or more sensors. In one ormore embodiments, the one or more processors, upon the one or moresensors detecting the electronic device is disposed within a repositorycontainer such as a pocket or purse, apply an audio signal adjustmentfunction to signals received from the one or more microphones. Theapplication of the audio signal adjustment function advantageously worksto mitigate noise and attenuation in the signals caused by therepository container.

Advantageously, embodiments of the disclosure uniquely detect anenclosed condition. Once this enclosed condition is detected,embodiments of the disclosure can determine an acoustic signaladjustment function. This can occur by adaptively detecting least“rubbing” or “crinkling” or other acoustic energy during motion, asidentified by one or more microphones an/or an accelerometer.Alternatively, this can occur by comparing signals received by one ormore microphones. Alternatively, the direction of gravity can be used todetermine which microphone or loudspeaker is most likely to be the bestat receiving sounds in the enclosed environment. Other sensors that canassist include ambient light sensor, pressure sensor, imagers, or othersensors that will be obvious to those of ordinary skill in the arthaving the benefit of this disclosure. In one or more embodiments, oneor more processors can select microphones receiving a least amount of“rubbing” or “crinkling” or other acoustic energy and disable others.

As noted above, the one or more processors can perform acoustic sweepsupon detecting the enclosed condition. This can include delivering apredefined acoustic output and measuring the return signals receivedwith one or more microphones. This technique can be used to determinethe audio signal adjustment function. If the audio signal adjustmentfunction changes as a result of movement of the electronic device ormovement of the enclosure, the function can be updated. In one or moreembodiments, the audio signal adjustment function is updated every timemotion is detected by an accelerometer, as this can indicate a changingenvironment. When the enclosed condition is no longer present, theapplication of the audio signal adjustment function can be removed.

Turning now to FIG. 1, illustrated therein is one explanatory electronicdevice 100 and corresponding method 101 in accordance with one or moreembodiments of the disclosure. The electronic device 100 includes one ormore audio transducers 102,103,104,105. The audio transducers102,103,104,105 can each comprise a microphone, a loudspeaker, orcombinations thereof. While four audio transducers 102,103,104,105 areshown in FIG. 1, in other embodiments the electronic device 100 couldinclude more than four audio transducers 102,103,104,105 or fewer thatfour audio transducers 102,103,104,105.

In one or more embodiments, the audio transducers 102,103,104,105 arelocated about the sides of the electronic device 100. In one or moreembodiments, the audio transducers 102,103,104,105 can point to theside, top, or front of the device. Said differently, in one or moreembodiments the audio transducers 102,103,104,105 are located about aperimeter of the electronic device 100. In this illustrative embodiment,the audio transducers 102,103,104,105 are each disposed at or near acorner of the electronic device 100. For example, a first audiotransducer 102 can be disposed at a first corner of the electronicdevice 100, while another audio transducer 103 can be disposed at asecond corner of the electronic device 100, and so forth.

It should be noted that corners are not the only location at which audiotransducers 102,103,104,105 can be located. There are many locations ataudio transducers 102,103,104,105 may be located. These locationsinclude corner locations of the electronic device 100, edge locations ofthe electronic device 100, end locations of the electronic device 100,major face locations of the electronic device 100, or ad hoc locationsof the electronic device 100 based upon application and desiredfunctionality. These locations can be used individually or incombination to achieve the desired acoustic energy delivery or receptionradius and radial detection sweep about the electronic device 100. Forexample, some audio transducers 102,103,104,105 can be disposed alongthe front major face of the electronic device 100, while other audiotransducers 102,103,104,105 are disposed on the rear major face of theelectronic device 100, and so forth. Other locations and combinationswill be obvious to those of ordinary skill in the art having the benefitof this disclosure.

In addition to the audio transducers 102,103,104,105, the electronicdevice 100 also includes one or more sensors. These sensors will bedescribed in more detail with reference to FIGS. 2 and 3 below, but caninclude accelerometers, gravity detectors (note that an accelerometercan also serve as a gravity detector by measuring dynamic acceleration,motion/vibration, static acceleration, and so forth), motion detectors,temperature sensors, light sensors, touch sensors force sensors,location sensors, pressure sensors, and other sensors. One or moreprocessors 106 of the electronic device 100 are operable with the audiotransducers 102,103,104,105 and the one or more sensors.

At step 107 of the method 101, a user 110 is using the electronic device100 by holding it in the hand. The electronic device 100 therefore isnot in an enclosed condition. It is instead in free-space, with only theuser's hand touching the electronic device 100. In a non-enclosedcondition, each of the audio transducers 102,103,104,105 has associatedtherewith a transfer function 111,112,113,114. In one or moreembodiments, each transfer function 111,112,113,114 establishes at leasta predefined gain and predefined spectral equalization parameter foreach of the audio transducers 102,103,104,105. Thus, when operating in anon-enclosed environment, audio transducer 102 will operate using thegain and spectral equalization factors set forth in transfer function111, while audio transducer 103 will operate using the gain and spectralequalization factors set forth in transfer function 112, and so forth.

While gain and spectral equalization factors are examples of parametersthan can be included with each transfer function 111,112,113,114, otherfactors can be used as well. For example, analog or digital filteringparameters, compression parameters, equalization parameters, noisereduction parameters, limiting parameters, leveling parameters, or otherparameters can also be included in each transfer function111,112,113,114 as well. Some transfer functions will have oneparameter, while others will have many. Other parameters suitable forinclusion with the transfer functions 111,112,113,114 will be obvious tothose of ordinary skill in the art having the benefit of thisdisclosure.

At step 108 of the method 101, the user 110 begins placing theelectronic device 100 in a pocket. One or more sensors operable with theone or more processors 106 detect this transition from open air to anenclosed condition, i.e., an in-pocket condition in this example. Forexample, an accelerometer may detect, at step 108, the electronic device100 being lowered from the user's head toward a pocket. Other techniquesfor detecting enclosed conditions will be described below with referenceto FIG. 5. Still others will be obvious to those of ordinary skill inthe art having the benefit of this disclosure.

At step 109 of the method 101, the one or more processors 106, operatingwith the one or more sensors, detect that the electronic device 100 isin an enclosed position or disposed within a repository container. Inthis illustrative example, the repository container enclosing theelectronic device is the user's pocket 115. However, it should be notedthat a pocket 115 is merely one type of repository container into whichan electronic device 100 can be placed to create an enclosed condition.Purses, backpacks, cases, briefcases, attaches, drawers, and otherrepository containers can also create enclosed conditions for theelectronic device 100.

In one or more embodiments, upon the one or more processors 106 or oneor more sensors detecting the enclosed condition or that the electronicdevice 100 is disposed within a repository container, the one or moreprocessors 106 determine an audio signal adjustment function 116 for theone or more audio transducers 102,103,104,105. In one embodiment, theaudio signal adjustment function 116 comprises at least a gainadjustment and a spectral equalization adjustment.

For example, after detecting the enclosed condition at step 109 of themethod 101, the gain adjustment of the audio signal adjustment function116 can increase the gain of one or more microphones or loudspeakers tobe better able to better deliver to, or better receive from, acousticenergy from the environment through the enclosure, which in this case isthe user's pocket 115. Gain adjustment works to acoustically overcomesound attenuation due to the pocket 115. Similarly, since it isdifficult to completely assess the spectral impact on acoustic energybeing received from, or delivered to, the environment through the pocket115, the one or more processors 106 infer, from performing an audiosweep or other techniques, an audio degradation function. The audiosignal adjustment function 116 can then include an inverse of thisfunction to apply correction factors specific to the material of thepocket 115 that is impacting the audio “spectral function” of the one ormore audio transducers 102,103,104,105.

Where the free-space transfer function 111,112,113,114 establishes apredefined gain and predefined spectral equalization parameter for eachof the audio transducers 102,103,104,105, the audio signal adjustmentfunction 116 comprises at least a gain adjustment and a spectralequalization adjustment. However, where other factors are used in thetransfer functions 111,112,113,114, other adjustment parameters can beincluded in the audio signal adjustment function 116. For example, wherethe transfer function 111,112,113,114 includes analog or digitalfiltering parameters, compression parameters, equalization parameters,noise reduction parameters, limiting parameters, leveling parameters, orother parameters, corresponding adjustments to one or more of thesefactors can also be included in the audio signal adjustment function116.

At step 109, upon detecting the enclosed condition and determining theaudio signal adjustment function 116 in response to the enclosedcondition, the one or more processors 106 apply the audio signaladjustment function 116 to the one or more audio transducers102,103,104,105. Said differently, in one or more embodiments the one ormore processors 106, upon the one or more sensors detecting theelectronic device 100 is disposed within a repository container, i.e.,pocket 115, apply the audio signal adjustment function 116 to signals117,118,119,120 received from the one or more microphones of the one ormore audio transducers 102,103,104,105 or delivered to one or moreloudspeakers of the one or more audio transducers 102,103,104,105,thereby mitigating noise or degradation in the signals 117,118,119,120caused by the repository container. In this illustrative example, thegain and spectral equalization of audio transducers 102,103,105 isadjusted in accordance with a determined function, while audiotransducer 104 is simply turned OFF.

Turning now to FIG. 2, illustrated therein is one explanatory blockdiagram schematic 200 of the explanatory electronic device 100 ofFIG. 1. In one or more embodiments, the block diagram schematic 200 isconfigured as a printed circuit board assembly disposed within a housing201 of the electronic device 100. Various components can be electricallycoupled together by conductors or a bus disposed along one or moreprinted circuit boards.

The illustrative block diagram schematic 200 of FIG. 2 includes manydifferent components. Embodiments of the disclosure contemplate that thenumber and arrangement of such components can change depending on theparticular application. Accordingly, electronic devices configured inaccordance with embodiments of the disclosure can include somecomponents that are not shown in FIG. 2, and other components that areshown may not be needed and can therefore be omitted.

The illustrative block diagram schematic 200 includes a user interface202. In one or more embodiments, the user interface 202 includes adisplay 203, which may optionally be touch-sensitive. In one embodiment,users can deliver user input to the display 203 of such an embodiment bydelivering touch input from a finger, stylus, or other objects disposedproximately with the display 203. In one embodiment, the display 203 isconfigured as an active matrix organic light emitting diode (AMOLED)display. However, it should be noted that other types of displays,including liquid crystal displays, suitable for use with the userinterface 202 would be obvious to those of ordinary skill in the arthaving the benefit of this disclosure.

As noted above, in one or more embodiments the electronic device 100includes one or more processors 106. In one embodiment, the one or moreprocessors 106 can include an application processor and, optionally, oneor more auxiliary processors. One or both of the application processoror the auxiliary processor(s) can include one or more processors. One orboth of the application processor or the auxiliary processor(s) can be amicroprocessor, a group of processing components, one or more ASICs,programmable logic, or other type of processing device. The applicationprocessor and the auxiliary processor(s) can be operable with thevarious components of the block diagram schematic 200. Each of theapplication processor and the auxiliary processor(s) can be configuredto process and execute executable software code to perform the variousfunctions of the electronic device with which the block diagramschematic 200 operates. A storage device, such as memory 205, canoptionally store the executable software code used by the one or moreprocessors 106 during operation.

In this illustrative embodiment, the block diagram schematic 200 alsoincludes a communication circuit 206 that can be configured for wired orwireless communication with one or more other devices or networks. Thenetworks can include a wide area network, a local area network, and/orpersonal area network. Examples of wide area networks include GSM, CDMA,W-CDMA, CDMA-2000, iDEN, TDMA, 2.5 Generation 3GPP GSM networks, 3rdGeneration 3GPP WCDMA networks, 3GPP Long Term Evolution (LTE) networks,and 3GPP2 CDMA communication networks, UMTS networks, E-UTRA networks,GPRS networks, iDEN networks, and other networks. The communicationcircuit 206 may also utilize wireless technology for communication, suchas, but are not limited to, peer-to-peer or ad hoc communications suchas HomeRF, Bluetooth and IEEE 802.11 (a, b, g or n); and other forms ofwireless communication such as infrared technology. The communicationcircuit 206 can include wireless communication circuitry, one of areceiver, a transmitter, or transceiver, and one or more antennas.

In one embodiment, the one or more processors 106 can be responsible forperforming the primary functions of the electronic device with which theblock diagram schematic 200 is operational. For example, in oneembodiment the one or more processors 106 comprise one or more circuitsoperable with the user interface 202 to present presentation informationto a user. The executable software code used by the one or moreprocessors 106 can be configured as one or more modules 207 that areoperable with the one or more processors 106. Such modules 207 can storeinstructions, control algorithms, and so forth.

In one or more embodiments, the block diagram schematic 200 includes anaudio input/processor 209. The audio input/processor 209 is operable toreceive audio input from an environment about the electronic device 100.The audio input/processor 209 can include hardware, executable code, andspeech monitor executable code in one embodiment.

In one or more embodiments, the audio input/processor 209 is operablewith the one or more audio transducers (102,103,104,105) to perform an“acoustic sweep” when the electronic device 100 is in an enclosedcondition. In one or more embodiments, the audio input/processor 209performs an acoustic sweep by causing one or more loudspeakers of theone or more audio transducers (102,103,104,105) to emit predefinedacoustic signals. At the same time, the audio input/processor 209 causesone or more microphones of the one or more audio transducers(102,103,104,105) to receive the predefined acoustic signals emitted bythe one or more loudspeakers of the one or more audio transducers(102,103,104,105).

The audio input/processor 209 can then measure attenuation or othertransfer function degradation of those signals as received by one ormore microphones of the one or more audio transducers (102,103,104,105)of the electronic device 100. Accordingly, in one embodiment theacoustic sweep comprises delivering, from one or more audio outputdevices, a predefined acoustic output to one or more microphones andmeasuring, with one or more processors 106, attenuation of thepredefined acoustic output occurring between the one or more audiooutput devices and the one or more microphones. The responsecoefficients can then be used to define the audio signal adjustmentfunction (116).

Thus, in one or more embodiments the one or more audio transducers(102,103,104,105) each comprise one or more audio output devices and oneor more microphones. The one or more processors 106, working inconjunction with the audio input/processor 209, determine the audiosignal adjustment function (116) function by measuring attenuation of apredefined acoustic output from the one or more audio output deviceswhen received by the one or more microphones.

As noted above, these audio sweeps can be performed on a periodic basis.This helps to ensure that the audio signal adjustment function (116) isonly applied when the electronic device 100 is in the enclosedcondition. In one or more embodiments, when the enclosed conditionceases, application of the audio signal adjustment function (116) alsoceases. Said differently, in one or more embodiments, the one or moreprocessors 106 also detect, using one or more sensors 208, cessation ofthe enclosed condition. When this occurs, the one or more processors 106terminate application of the audio signal adjustment function (116) tothe signals (117,118,119,120) received from the one or more audiotransducers (102,103,104,105).

In addition to being used to determine the audio signal adjustmentfunction (116), the audio input/processor 209 can use the sweeps todetermine in what type of repository container the electronic device 100is situated as well. Using the example of a pocket (115) as a repositorycontainer, in one or more embodiments the audio input/processor 209 canbe operable with one or more predefined authentication references 216stored in memory 205. With reference to audio input, the predefinedauthentication references 216 can comprise representations of audiosignals received during audio sweeps in predefined conditions.

For example, one predefined authentication reference 216 can comprise arepresentation of an audio sweep when the electronic device 100 isdisposed in free space. Another predefined authentication reference 216can comprise a representation of an audio sweep when the electronicdevice 100 is disposed within a denim pocket. Another authenticationreference 216 can comprise a representation of an audio sweep when theelectronic device 100 is disposed within a nylon pocket. Still anotherauthentication reference 216 can comprise a representation of an audiosweep when the electronic device 100 is disposed within a corduroypocket. By comparing the results of a performed audio sweep with theauthentication references 216 stored in memory 205, the one or moreprocessors 106 can estimate an identification of the material of thepocket (115).

Thus, in one or more embodiments the audio input/processor 209 canperform an acoustic sweep when the electronic device is detected asbeing disposed in an enclosure. A data representation of the sweep canthen be compared to the one or more predefined authentication references216 stored in a table in the memory 205. If a sufficiently matchingpredefined authentication reference 216 is found, the one or moreprocessors 106 can conclude that the material associated with thesufficiently matching predefined authentication reference 216 is thematerial of the enclosure. If the sufficiently matching predefinedauthentication reference 216 corresponds to a denim pocket, forinstance, the one or more processors 106 can conclude that theelectronic device 100 is situated in a denim pocket, such as in a pocketof a pair of blue jeans.

Thus, in one or more embodiments where the enclosed condition comprisesan in-pocket condition, the one or more processors 106 can identify apocket material by referencing a table of predefined authenticationreferences 216 or identification references corresponding to a pluralityof pocket materials, each having a corresponding predefined audio signaladjustment function. By comparing the determined audio signal adjustmentfunction (116) to the table of predefined authentication references 216corresponding to a plurality of pocket materials, the one or moreprocessors 106 can selecting a closest predefined audio signaladjustment function from the table to identify the material of thepocket (115). In one or more embodiments, when applying the audio signaladjustment function (116), the one or more processors 106 will apply theaudio signal adjustment function (116) associated with the sufficientlymatching predefined authentication reference 216, as it comprises theclosest predefined audio signal adjustment function for the signalsreceived from one or more microphones during the audio sweep. Ingeneral, the predefined authentication reference 216 and applying theaudio signal adjustment function (116) will not be identical transferfunctions, but rather transfer function pairs related to one another.This will allow the audio signal adjustment function (116) to correctfor the degradation in a signal as it passes through a signal eventhough the degradation is not the same as what the acoustic waveexperiences as it travels within the enclosed space.

Where no sufficiently matching predefined authentication reference 216is found in the table in memory 205 such as resulting from multiplelayers of clothing, the audio input/processor 209 or the one or moreprocessors 106 can create a new predefined authentication reference 216.Illustrating by example, the one or more processors 106 may present aprompt on the display 203 asking the user (110) whether the electronicdevice 100 is situated within a pocket. If the user (110) indicates inthe affirmative, the one or more processors 106 may place another prompton the display 203 asking the identity of the material. If the user(110) were to enter “cotton taffeta,” for instance, the audioinput/processor 209 or the one or more processors 106 may create a newentry using the representation of the completed audio sweep as apredefined authentication reference 216 for future use in the memory.Accordingly, in one or more embodiments, upon failing to find asufficiently matching predefined authentication reference 216 in thetable in memory 205, the audio input/processor 209 or the one or moreprocessors 106 may record the audio signal adjustment function from theaudio sweep in the table as a new audio signal adjustment function or itmay calculate the new signal adjustment function using other more directmethods detailed below.

The audio input/processor 209 can include a beam steering engine 204comprising one or more microphones 220. Input from the one or moremicrophones 220 can be processed in the beam steering engine 204 suchthat the one or more microphones define a virtual microphone. Thisvirtual microphone can define an acoustic reception cone that can bevirtually “steered” around the electronic device 100. Alternatively,actual steering can occur as well, such as switching between a left andright microphone or a front and back microphone, or switching variousmicrophones ON and OFF individually. In one or more embodiments, two ormore microphones 220 can be included for selective beam steering by thebeam steering engine 204.

Illustrating by example, a first microphone can be located on a firstside of the electronic device 100 for receiving audio input from a firstdirection, while a second microphone can be placed on a second side ofthe electronic device 100 for receiving audio input from a seconddirection. These microphones can be “steered” by selectively turningthem ON and OFF.

The beam steering engine 204 can then select between the firstmicrophone and the second microphone to beam steer audio receptiontoward an object, such as a user delivering audio input. Illustrating byexample, different microphones can be selected based upon their locationalong the electronic device 100 relative to acoustic energy generatingsource locations. The separation between microphones can be included asfactors in beam steering, as well as the resulting phase shifts theincoming acoustic energy occurs as detected by microphones in differentlocations. In other words, since the microphones are disposed atdifferent locations along the electronic device 100, each microphoneresponds respond differently to received acoustic energy based upon itsseparation and the location of the source of the acoustic energy. Thisbeam steering can be responsive to input from other sensors, such asimagers, facial depth scanners, thermal sensors, or other sensors. Forexample, an imager can estimate a location of a person's face anddeliver signals to the beam steering engine 204, thereby alerting it inwhich direction to focus the acoustic reception cone and/or steer thefirst microphone and the second microphone.

Alternatively, the beam steering engine 204 processes and combines thesignals from two or more microphones to perform beam steering. The oneor more microphones 220 can be used for voice commands. In response tocontrol of the one or more microphones 220 by the beam steering engine204, a user location direction can be determined. The beam steeringengine 204 can then select between the first microphone and the secondmicrophone to beam steer audio reception toward the user. Alternatively,the audio input/processor 209 can employ a weighted combination of themicrophones to beam steer audio reception toward the user. In either ofthese embodiments, each microphone can be an omnidirectional microphoneelement or a directional microphone element.

Various sensors 208 can be operable with the one or more processors 106.Turning briefly to FIG. 3, illustrated therein are examples of somesensors that can be operable with the one or more processors (106) aswell. In one or more embodiments, many of these other sensors 208 areenvironmental sensors to detect environmental conditions about theelectronic device (100). General examples of these sensors include timesensors, date sensors, environmental sensors, weather sensors,ultrasonic sensors, location sensors, and so forth.

In one embodiment, a skin sensor 301 is configured to determine when theelectronic device (100) is touching the skin of a person. For example,when the electronic device (100) is being held within the hand of auser, this can be detected by the skin sensor 301, which can be disposedalong an edge of the electronic device (100) in one or more embodiments.The skin sensor 301 can include a substrate with an electrode disposedthereon. The electrode can confirm the object touching the skin sensor301 is skin by detecting electrical signals generated by a heartbeat inone embodiment. Other forms of skin sensors will be obvious to those ofordinary skill in the art having the benefit of this disclosure.

A touch sensor 302 can be operable with, or in place of, the skin sensor301. The touch sensor 302 can include a capacitive touch sensor, aninfrared touch sensor, resistive touch sensors, or anothertouch-sensitive technology. In one or more embodiments, the touch sensor302 comprises a plurality of touch sensors. For example, a first touchsensor 303 can be disposed on the front major face of the electronicdevice 100. A second touch sensor 304 can be disposed on the rear majorface of the electronic device 100. A third touch sensor 305 can besituated along one or more of the minor faces defined by the sides ofthe electronic device 100. Capacitive touch-sensitive devices include aplurality of capacitive sensors, e.g., electrodes, which are disposedalong a substrate. Each capacitive sensor is configured, in conjunctionwith associated control circuitry, e.g., the one or more processors(106), to detect an object in close proximity with—or touching—thesurface of the display (203) or the housing (201) of the electronicdevice (100) by establishing electric field lines between pairs ofcapacitive sensors and then detecting perturbations of those fieldlines.

The electric field lines can be established in accordance with aperiodic waveform, such as a square wave, sine wave, triangle wave, orother periodic waveform that is emitted by one sensor and detected byanother. It should be noted that, generally speaking, there are twotypes of capacitive sensors: mutual capacitive sensors and selfcapacitive sensors. Mutual capacitive sensors employ a grid with sourcelines and sense lines. Objects touching the mutual capacitive sensorschange the established charge between the source and sense lines of thegrid. The self capacitive sensor is one where the object touching thesensor forms one side of the capacitor, while the other is a conductiveplate in the electronic device (100). The capacitive sensors can beformed, for example, by disposing indium tin oxide patterned aselectrodes on the substrate. Indium tin oxide is useful for such systemsbecause it is transparent and conductive. Further, it is capable ofbeing deposited in thin layers by way of a printing process. Thecapacitive sensors may also be deposited on the substrate by electronbeam evaporation, physical vapor deposition, or other various sputterdeposition techniques.

A force sensor 306 can be included. The force sensor 306 can takevarious forms. For example, in one embodiment, the force sensor 306comprises resistive switches or a force switch array configured todetect contact with either the display (203) or the housing (201) of theelectronic device (100). An “array” refers to a set of at least oneswitch. The array of resistive switches can function as a force-sensinglayer, in that when contact is made with either the surface of thedisplay (203) or the housing (201) or the touch sensors 302 of theelectronic device (100), changes in impedance of any of the switches maybe detected.

The array of switches may be any of resistance sensing switches,membrane switches, force-sensing switches such as piezoelectricswitches, or other equivalent types of technology. In anotherembodiment, the force sensor 306 can be capacitive. In yet anotherembodiment, piezoelectric sensors can be configured to sense force aswell. For example, where coupled with the lens of the display (203), thepiezoelectric sensors can be configured to detect an amount ofdisplacement of the lens to determine force. The piezoelectric sensorscan also be configured to determine force of contact against the housing(201) of the electronic device (100) rather than the display (203).

A temperature sensor 307 can be configured to monitor the temperature ofthe environment. A light sensor 308 can be used to detect whether or notambient light is incident on the housing (201) of the electronic device(100). The light sensor 308 can also be used to detect an intensity ofambient light is above or below a predefined threshold. It should benoted that either an infrared sensor, e.g., the one or more proximitysensors 311 described below, or the light sensor 308 can be used todetect daylight and/or sun light. This information can be used todistinguish between a non-enclosed condition and an enclosed condition,such as when the electronic device (100) is situated within a darkpocket or purse. In one or more embodiments the light sensor 308 candetect changes in optical intensity, color, light, or shadow in the nearvicinity of the electronic device (100).

This information can be used to make inferences about whether theelectronic device (100) is disposed within a repository container, suchas a pocket (115). For example, if the light sensor 308 detectslow-light conditions, i.e., when the intensity of received ambient lightis below a predefined threshold, this can indicate that the electronicdevice (100) is disposed within a repository container. In oneembodiment, the light sensor 308 can be configured as an image-sensingdevice that captures successive images about the device and comparesluminous intensity, color, or other spatial variations between images todetect weather conditions. The pressure sensor 313 can distinguish anenclosed condition, e.g., inside a pocket from a non-enclosed, e.g.,outside the pocket, condition.

One or more microphones 309, which may be part of the one or moretransducers (102,103,104,105) or may be in addition to the one or moretransducers (102,103,104,105), can be included to receive acousticinput. While the one or more microphones 309 can be used to sense voiceinput, voice commands, and other audio input, in one or more embodimentsthey can be used as environmental sensors to sense environmental soundssuch as rumpling of soft surfaces of repository containers encapsulatingthe electronic device (100), such as textile materials, leather, vinyl,nylon, or synthetic materials. Alternatively, the one or moremicrophones 309 can be used to detect the nearby presence of itemsstowed in a repository container, such as the coins, keys, lotions, lipbalm, and other items that may be disposed within a pocket (115) orpurse with the electronic device (100). Accordingly, an enclosedcondition can be inferred from acoustic data captured by the one or moremicrophones in one or more embodiments.

In one or more embodiments, the one or more processors (106) may requirelocation information of the electronic device (100), such as to knowwhether the electronic device (100) is in a car. Accordingly, in oneembodiment a global positioning system device 310 can be included fordetermining a location and/or movement of the electronic device (100).In one or more embodiments, the global positioning system device 310 isconfigured for communicating with a constellation of earth orbitingsatellites or a network of terrestrial base stations to determine anapproximate location. Examples of satellite positioning systems suitablefor use with embodiments of the present invention include, among others,the Navigation System with Time and Range (NAVSTAR) Global PositioningSystems (GPS) in the United States of America, the Global OrbitingNavigation System (GLONASS) in Russia, and other similar satellitepositioning systems. The satellite positioning systems based locationfixes of the global positioning system device 310 autonomously or withassistance from terrestrial base stations, for example those associatedwith a cellular communication network or other ground based network, oras part of a Differential Global Positioning System (DGPS), as is wellknown by those having ordinary skill in the art.

While a global positioning system device 310 is one example of alocation determination device, it will be clear to those of ordinaryskill in the art having the benefit of this disclosure that otherlocation determination devices, such as electronic compasses orgyroscopes, could be used as well. For example, the global positioningsystem device 310 can be replaced by, or accompanied by, a locationdetector able to determine location by locating or triangulatingterrestrial base stations of a traditional cellular network, such as aCDMA network or GSM network, or from other local area networks, such asWi-Fi networks.

A proximity detector component 311 can emit infrared signals todetermine when the electronic device (100) is covered by an object suchas the sides of a repository container or the items disposed therein.Other sensors, subsets of these sensors, and so forth can be used inaccordance with the methods described herein.

The other sensors 208 can also include a motion sensor 312. The motionsensor 312 can include motion detectors, such as one or moreaccelerometers or gyroscopes. For example, an accelerometer may beembedded in the electronic circuitry of the electronic device (100) toshow vertical orientation, constant tilt and/or whether the electronicdevice (100) is stationary. The measurement of tilt relative to gravityis referred to as “static acceleration,” while the measurement of motionand/or vibration is referred to as “dynamic acceleration.” A gyroscopecan be used in a similar fashion.

Regardless of the type of motion sensors 312 that are used, in oneembodiment the motion sensors 312 are also operable to detect movement,and direction of movement, of the electronic device (100) by a user. Inone or more embodiments, the other sensors 208 and the motion sensors312 can each be used to detect motion corresponding to a user's body orto human motion. This information can be used to determine that theelectronic device (100) is proximately located with a user's body, whichcan lead to a conclusion that the electronic device (100) is disposedwithin a pocket (115).

Illustrating by example, in one embodiment when the electronic device(100) is placed within a pocket (115) of clothing that a user (110) iswearing, the motion sensors 312 can be used to detect predefined motionscorresponding to human motion. These predefined motions can be small,and can include vibration, shaking, breathing, micromotions, and soforth. For instance, if the user is walking, the motion sensors 312 candetect this movement. The one or more processors (106) can then extractparametric data from electronic signals delivered by these motionsensors 312 in response to the user walking. By comparing the parametricdata to a reference file stored in memory (205), the one or moreprocessors (106) can identify the walking motion as corresponding to themotion of the user's body. The one or more processors (106) can use thisinformation to distinguish the electronic device (100) being in a user'spocket (115) compared to, for example, being in a drawer.

Similarly, if the user is simply sitting in a chair, the motion sensors312 can be used to detect body motions—even tiny ones—such as that ofthe user breathing. By comparing the parametric data extracted from thismotion to a reference file stored in memory (205), the one or moreprocessors (106) can identify the fact that the movement that theelectronic device (100) is experiencing is due to the fact that theelectronic device (100) is proximately located with a user's torso,limbs, head, or appendages, or otherwise generally disposed along theuser body instead of, for example, being placed on a table. Other usermotion that can be readily detected by parametric data includes motionassociated with driving, riding a bike, or simply shifting in theirseat. In one or more embodiments, the one or more processors (106) canconclude from these motions that the electronic device (100) is disposednear or on a person's body.

These other sensors 208 can be used to confirm the electronic device(100) is disposed within a repository container in one or moreembodiments. Said differently, when the one or more processors (106)determine that an intensity of received ambient light is below apredefined threshold, an absence of touch sensor actuation occurs alonga housing of the electronic device (100), and an approximately commontemperature occurring at both a first location of the electronic deviceand a second location of the electronic device (100), the one or moreprocessors (106) conclude that the electronic device (100) is disposedwithin a repository container such as a pocket (115) or purse.

The one or more of these other sensors 208 can be used to confirm thisconclusion in one or more embodiments. For example, the motion sensor312 may confirm that motion of the electronic device (100) defined byparametric data from the motion sensor 312 indicates an approximaterotational stability of the electronic device 1300), thereby confirmingthat the electronic device (100) is covered by one or more sides of therepository container. The microphone 309 may detect the sound of textilematerial, leather, or synthetic materials as the electronic device (100)slides into the repository container. The skin sensor 301 may detectthat no skin is touching the housing (201). The proximity detectorcomponent 311 may determine that the electronic device (100) is covered.The temperature sensor 307 can be used to determine that theapproximately static temperature occurring at the first location and thesecond location of the electronic device (100) remains during apredetermined temperature measurement interval, such as thirty secondsor a minute. These each can provide a confirmation of the in-repositorycontainer condition, and can be used alone or in combination with otherfactors.

The motion sensors 312 can be configured as an orientation detector thatdetermines an orientation and/or movement of the electronic device (100)in three-dimensional space. The orientation detector can determine thespatial orientation of an electronic device (100) in three-dimensionalspace by, for example, detecting a gravitational direction. In additionto, or instead of, an accelerometer, an electronic compass can beincluded to detect the spatial orientation of the electronic device(100) relative to the earth's magnetic field. Similarly, one or moregyroscopes can be included to detect rotational orientation of theelectronic device (100).

One or more pressure sensors 313 can be included to detect pressureapplied to the electronic device (100). The one or more pressure sensors313 can be coupled to analog-to-digital converters to provide the one ormore processors (106) digitized version of a pressure signal receivedfrom the one or more pressure sensors 313.

Turning now back to FIG. 2, in one or more embodiments an authenticationsystem 227 is operable with the one or more processors 106. A firstauthenticator of the authentication system 227 can include an imagerprocessing system 223. The imager processing system 223 can include oneor more of an imager, a depth imager, thermal sensor, or combinationsthereof. In one embodiment, the imager comprises a two-dimensionalimager configured to receive at least one image of a person within anenvironment of the electronic device 100. In one embodiment, the imagercomprises a two-dimensional Red-Green-Blue (RGB) imager. In anotherembodiment, the imager comprises an infrared imager. Other types ofimagers suitable for use with the imager processing system 223 and theauthentication system 227 will be obvious to those of ordinary skill inthe art having the benefit of this disclosure.

Where included, the thermal sensor of the imager processing system 223can also take various forms. In one embodiment, the thermal sensor issimply a proximity sensor component, also referred to as “presencesensor,” which detects temperature change. In another embodiment, thethermal sensor comprises a simple thermopile. In another embodiment, thethermal sensor comprises an infrared imager that captures the amount ofthermal energy emitted by an object. Other types of thermal sensors willbe obvious to those of ordinary skill in the art having the benefit ofthis disclosure.

Where included, the depth imager can take a variety of forms. In a firstembodiment, the depth imager comprises a pair of imagers separated by apredetermined distance, such as three to four images. This “stereo”imager works in the same way the human eyes do in that it capturesimages from two different angles and reconciles the two to determinedistance.

In another embodiment, the depth imager employs a structured lightlaser. The structured light laser projects tiny light patterns thatexpand with distance. These patterns land on a surface, such as a user'sface, and are then captured by an imager. By determining the locationand spacing between the elements of the pattern, three-dimensionalmapping can be obtained.

In still another embodiment, the depth imager comprises a time of flightdevice. Time of flight three-dimensional sensors emit laser or infraredpulses from a photodiode array. These pulses reflect back from asurface, such as the user's face. The time it takes for pulses to movefrom the photodiode array to the surface and back determines distance,from which a three-dimensional mapping of a surface can be obtained.Regardless of embodiment, the depth imager adds a third “z-dimension” tothe x-dimension and y-dimension defining the two-dimensional imagecaptured by the imager, thereby enhancing the security of using aperson's face as their password in the process of authentication byfacial recognition.

The authentication system 227 can be operable with a face/environmentalanalyzer 219. The face/environmental analyzer 219 can be configured toprocess an image or depth scan of an object and determine whether theobject matches predetermined criteria by comparing the image or depthscan to one or more predefined authentication references stored inmemory 205.

For example, the face/environmental analyzer 219 can operate as anauthentication module configured with optical and/or spatial recognitionto identify objects using image recognition, character recognition,visual recognition, facial recognition, color recognition, shaperecognition, and the like. Advantageously, face/environmental analyzer219, operating in tandem with the authentication system 227, can be usedas a facial recognition device to determine the identity of one or morepersons detected about the electronic device 100.

In one embodiment when the authentication system 227 detects a person,one or both of the imager and/or the depth imager can capture aphotograph and/or depth scan of that person. The authentication system227 can then compare the image and/or depth scan to one or morepredefined authentication references stored in the memory 205. Thiscomparison, in one or more embodiments, is used to confirm beyond athreshold authenticity probability that the person's face—both in theimage and the depth scan—sufficiently matches one or more of thepredefined authentication references stored in the memory 205 toauthenticate a person as an authorized user of the electronic device100.

The face/environmental analyzer 219 can include a gaze detector. Thegaze detector can comprise sensors for detecting the user's gaze point.The gaze detector can optionally include sensors for detecting thealignment of a user's head in three-dimensional space. Electronicsignals can then be processed for computing the direction of user's gazein three-dimensional space. The gaze detector can further be configuredto detect a gaze cone corresponding to the detected gaze direction,which is a field of view within which the user may easily see withoutdiverting their eyes or head from the detected gaze direction. The gazedetector can be configured to alternately estimate gaze direction byinputting images representing a photograph of a selected area near oraround the eyes. It will be clear to those of ordinary skill in the arthaving the benefit of this disclosure that these techniques areexplanatory only, as other modes of detecting gaze direction can besubstituted in the gaze detector of FIG. 2.

The face/environmental analyzer 219 can include its own image/gazedetection-processing engine as well. The image/gaze detection-processingengine can process information to detect a user's gaze point. Theimage/gaze detection-processing engine can optionally also work with thedepth scans to detect an alignment of a user's head in three-dimensionalspace. Electronic signals can then be delivered from the imager or thedepth imager for computing the direction of user's gaze inthree-dimensional space. The image/gaze detection-processing engine canfurther be configured to detect a gaze cone corresponding to thedetected gaze direction, which is a field of view within which the usermay easily see without diverting their eyes or head from the detectedgaze direction. The image/gaze detection-processing engine can beconfigured to alternately estimate gaze direction by inputting imagesrepresenting a photograph of a selected area near or around the eyes. Itcan also be valuable to determine if the user wants to be authenticatedby looking directly at device. The image/gaze detection-processingengine can determine not only a gazing cone but also if an eye islooking in a particular direction to confirm user intent to beauthenticated.

Other components 226 operable with the one or more processors 106 caninclude output components such as video, audio, and/or mechanicaloutputs. For example, the output components may include a video outputcomponent or auxiliary devices including a cathode ray tube, liquidcrystal display, plasma display, incandescent light, fluorescent light,front or rear projection display, and light emitting diode indicator.Other examples of output components include audio output components suchas a loudspeaker disposed behind a speaker port or other alarms and/orbuzzers and/or a mechanical output component such as vibrating ormotion-based mechanisms.

The other components 226 can also include proximity sensors. Theproximity sensors fall in to one of two camps: active proximity sensorsand “passive” proximity sensors. Either the proximity detectorcomponents or the proximity sensor components can be generally used forgesture control and other user interface protocols, some examples ofwhich will be described in more detail below.

As used herein, a “proximity sensor component” comprises a signalreceiver only that does not include a corresponding transmitter to emitsignals for reflection off an object to the signal receiver. A signalreceiver only can be used due to the fact that a user's body or otherheat generating object external to device, such as a wearable electronicdevice worn by user, serves as the transmitter. An active proximitysensor, which includes a transmitter and a receiver, measures reflectionof transmitted signals as received by a receiver. Passive proximitysensors include only a receiver that receives transmitted signals fromoutside the electronic device 100, e.g., body heat, etc. Illustrating byexample, in one the proximity sensor components comprise a signalreceiver to receive signals from objects external to the housing 201 ofthe electronic device 100. In one embodiment, the signal receiver is aninfrared signal receiver to receive an infrared emission from an objectsuch as a human being when the human is proximately located with theelectronic device 100. In one or more embodiments, the proximity sensorcomponent is configured to receive infrared wavelengths of about four toabout ten micrometers. This wavelength range is advantageous in one ormore embodiments in that it corresponds to the wavelength of heatemitted by the body of a human being.

Additionally, detection of wavelengths in this range is possible fromfarther distances than, for example, would be the detection of reflectedsignals from the transmitter of a proximity detector component. In oneembodiment, the proximity sensor components have a relatively longdetection range so as to detect heat emanating from a person's body whenthat person is within a predefined thermal reception radius. Forexample, the proximity sensor component may be able to detect a person'sbody heat from a distance of about fifteen feet in one or moreembodiments. The ten-foot dimension can be extended as a function ofdesigned optics, sensor active area, gain, lensing gain, and so forth.

Proximity sensor components are sometimes referred to as a “passive IRdetectors” due to the fact that the person is the active transmitter.Accordingly, the proximity sensor component requires no transmittersince objects disposed external to the housing deliver emissions thatare received by the infrared receiver. As no transmitter is required,each proximity sensor component can operate at a very low power level.Simulations show that a group of infrared signal receivers can operatewith a total current drain of just a few microamps.

In one embodiment, the signal receiver of each proximity sensorcomponent can operate at various sensitivity levels so as to cause theat least one proximity sensor component to be operable to receive theinfrared emissions from different distances. For example, the one ormore processors 106 can cause each proximity sensor component to operateat a first “effective” sensitivity so as to receive infrared emissionsfrom a first distance. Similarly, the one or more processors 106 cancause each proximity sensor component to operate at a secondsensitivity, which is less than the first sensitivity, so as to receiveinfrared emissions from a second distance, which is less than the firstdistance. The sensitivity change can be effected by causing the one ormore processors 106 to interpret readings from the proximity sensorcomponent differently.

By contrast, proximity detector components include a signal emitter anda corresponding signal receiver, which constitute an “active IR” pair.While each proximity detector component can be any one of various typesof proximity sensors, such as but not limited to, capacitive, magnetic,inductive, optical/photoelectric, imager, laser, acoustic/sonic,radar-based, Doppler-based, thermal, and radiation-based proximitysensors, in one or more embodiments the proximity detector componentscomprise infrared transmitters and receivers. The infrared transmittersare configured, in one embodiment, to transmit infrared signals havingwavelengths of about 860 nanometers, which is one to two orders ofmagnitude shorter than the wavelengths received by the proximity sensorcomponents. The proximity detector components can have signal receiversthat receive similar wavelengths, i.e., about 860 nanometers.

In one or more embodiments, each proximity detector component can be aninfrared proximity sensor set that uses a signal emitter that transmitsa beam of infrared light that reflects from a nearby object and isreceived by a corresponding signal receiver. Proximity detectorcomponents can be used, for example, to compute the distance to anynearby object from characteristics associated with the reflectedsignals. The reflected signals are detected by the corresponding signalreceiver, which may be an infrared photodiode used to detect reflectedlight emitting diode (LED) light, respond to modulated infrared signals,and/or perform triangulation of received infrared signals.

The other components 226 can optionally include a barometer operable tosense changes in air pressure due to elevation changes or differingpressures of the electronic device 100. Where included, in oneembodiment the barometer includes a cantilevered mechanism made from apiezoelectric material and disposed within a chamber. The cantileveredmechanism functions as a pressure sensitive valve, bending as thepressure differential between the chamber and the environment changes.Deflection of the cantilever ceases when the pressure differentialbetween the chamber and the environment is zero. As the cantileveredmaterial is piezoelectric, deflection of the material can be measuredwith an electrical current.

The other components 226 can also optionally include a light sensor thatdetects changes in optical intensity, color, light, or shadow in theenvironment of an electronic device. This can be used to make inferencesabout context such as weather or colors, walls, fields, and so forth, orother cues. An infrared sensor can be used in conjunction with, or inplace of, the light sensor. The infrared sensor can be configured todetect thermal emissions from an environment about the electronic device100. Similarly, a temperature sensor can be configured to monitortemperature about an electronic device.

A context engine 213 can then operate with the various sensors todetect, infer, capture, and otherwise determine persons and actions thatare occurring in an environment about the electronic device 100. Forexample, where included one embodiment of the context engine 213determines assessed contexts and frameworks using adjustable algorithmsof context assessment employing information, data, and events. Theseassessments may be learned through repetitive data analysis.Alternatively, a user may employ the user interface 202 to enter variousparameters, constructs, rules, and/or paradigms that instruct orotherwise guide the context engine 213 in detecting multi-modal socialcues, emotional states, moods, and other contextual information. Thecontext engine 213 can comprise an artificial neural network or othersimilar technology in one or more embodiments.

In one or more embodiments, the context engine 213 is operable with theone or more processors 106. In some embodiments, the one or moreprocessors 106 can control the context engine 213. In other embodiments,the context engine 213 can operate independently, delivering informationgleaned from detecting multi-modal social cues, emotional states, moods,and other contextual information to the one or more processors 106. Thecontext engine 213 can receive data from the various sensors. In one ormore embodiments, the one or more processors 106 are configured toperform the operations of the context engine 213.

In one or more embodiments, the one or more processors 106 can beoperable with the various authenticators of the authentication system227. For example, the one or more processors 106 can be operable with afirst authenticator and a second authenticator. Where moreauthenticators are included in the authentication system 227, the one ormore processors 106 can be operable with these authenticators as well.

It is to be understood that FIG. 2 is provided for illustrative purposesonly and for illustrating components of one electronic device 100 inaccordance with embodiments of the disclosure, and is not intended to bea complete schematic diagram of the various components required for anelectronic device. Therefore, other electronic devices in accordancewith embodiments of the disclosure may include various other componentsnot shown in FIG. 2, or may include a combination of two or morecomponents or a division of a particular component into two or moreseparate components, and still be within the scope of the presentdisclosure.

Turning now to FIG. 4, illustrated therein is one explanatory method 400in accordance with one or more embodiments of the disclosure. At step401, the method 400 detects, using one or more sensors, that anelectronic device is in an enclosed condition, which can occur as aresult of the electronic device being placed in a pocket, purse, orother repository container. This step 401 can occur in a number of ways.Turning briefly to FIG. 5, illustrated therein are two methods by whichthe detection of the enclosed condition can occur.

Illustrated in FIG. 5 are two methods for performing the step 401 ofdetecting, with one or more sensors of the electronic device, anenclosed condition, such as when the electronic device is placed in apocket or purse. Beginning with step 501 of the first method, in oneembodiment one or more processors of the electronic device detectmotion, which can be continuous motion or, even if the user is notmoving, micromotion, of the electronic device. The one or moreprocessors then extract parametric data from signals corresponding tothe motion as delivered by the motion detector. The one or moreprocessors can then compare the motion to human motion to confirm thatthe electronic device is disposed along a human body. When theelectronic device is situated in the pocket, the one or more processorswill detect human motion data.

At step 502, the one or more processors can then detect an absence offinger touch along a housing of the electronic device. When theelectronic device is disposed within the pocket, the one or moreprocessors will accordingly detect that the user is not touching theelectronic device.

At step 503, the one or more processors can detect the temperature ofthe electronic device using the temperature sensor or alternatively theproximity sensor components. This temperature detection can be done forthe electronic device overall, at selective locations or at a first endand at a second end. In one embodiment, the one or more processors candetermine if any or all of the electronic device temperature, thetemperature of the first end of the electronic device, or thetemperature at the second end of the electronic device exceeds apredetermined threshold, such as eighty degrees Fahrenheit. In anotherembodiment, the one or more processors can determine if the temperatureof the first location of the electronic device and/or the temperature atthe second location of the electronic device exceeds a predeterminedthreshold, such as eighty degrees Fahrenheit. Where it does not, theelectronic device may be stored in another vessel such as a drawer.Where it is, this optional decision can confirm that the electronicdevice is actually disposed within the pocket. Moreover, thisinformation can be used to determine which side of the electronic deviceis facing toward the user due to which capacitive sensor is facing thebody—front or back. In one or more embodiments, an accelerometer canalso distinguish sliding motion as the electronic device is beinginserted into pocket and micromotion of the user's body.

In one or more embodiments, the one or more processors can detect atemperature of the electronic device at both the first location and atthe second location. The one or more processors can determine whetherthese temperatures define an approximately common temperature. As notedabove, in one embodiment the approximately common temperature is definedby a temperature difference that is within a predefined range. In oneillustrative embodiment, the temperature difference is plus or minus twodegrees centigrade. Other ranges will be obvious to those of ordinaryskill in the art having the benefit of this disclosure. Where thetemperature is an approximately common temperature, this can indicatethat there is no significant differential as would be the case if theuser was holding either the first end or the second end in their handwith the other end in the air. This is indicative of the electronicdevice being disposed within the pocket.

In one or more embodiments, after executing steps 501,502,503, the oneor more processors can confirm that the electronic device is disposedwithin the pocket when the motion corresponds to human movement, theabsence of finger touch is confirmed, and the temperature at the firstlocation and the second location is within a predefined range.Accordingly, when an electronic device is placed within a pocket,embodiments of the disclosure confirm no side touching is occurring witha touch sensor and confirm that motion corresponds to human movement,and when both conditions are true, then confirm with either atemperature sensor or one or more proximity sensor components that awarm body is adjacent to the electronic device. Where proximity sensorcomponents are used, it can be preferable to use the sensors disposed atthe bottom of the electronic device. These can be selected based upon adetermination of a gravity direction as explained below. If both bottomproximity sensor components indicate similar thermal levels, thenelectronic device is determined to be in a pocket.

There are additional, optional steps that can be performed ensure thatthe conclusion that the electronic device is disposed within the pockethas a lower margin of error. Beginning with optional step 504, in one ormore embodiments the one or more processors are further operable todetermine a gravity direction relative to the electronic device.

This can be done with the accelerometer in one embodiment. In one ormore embodiments, the one or more processors are further operable todetermine an orientation of the electronic device once the electronicdevice has been placed within the pocket. Accordingly, in one or moreembodiments the one or more processors confirm that at least a componentof the gravity direction runs from a first end of the electronic deviceto a second end of the electronic device to confirm the in-pocketstatus, as the electronic device will generally be right side up orupside down when in a front or rear pants pocket. In one embodiment,once the “most downward” pointing end is determined, the first locationand the second location can be determined as a function of this end. Forexample, in one embodiment, both the first location and the secondlocation are disposed at a common end, which is the most downwardpointing end, or the second end in this example. This ensures that boththe first location and the second location are disposed within thepocket.

Where a user places the electronic device in a pocket, as was shownabove at step (108) of FIG. 1, the movement used to place the electronicdevice in the pocket has associated therewith a velocity andacceleration. In one embodiment the one or more processors candetermine, with the motion detector whether the movement and/or motionprofile, which can include velocity and acceleration, duration, and thestopping of the motion occurring during the movement exceeds apredetermined threshold. In one embodiment, a predetermined accelerationthreshold is about 0.5 meters per second square, net of gravity.Embodiments of the disclosure contemplate that the user will take careto ensure that the electronic device is safely placed within the pocket.Accordingly, the movement will be slow and deliberate. Additionally,when a person is walking, the motion of the electronic device will beslow as well. If a person is simply sitting in a chair and breathing,the velocity and acceleration experienced by the electronic device willbe low as well. By confirming that characteristics of the movement, suchas velocity and acceleration are below a predefined threshold, this canserve as an additional confirmation of the in-pocket condition.

In one or more embodiments, the acceleration determination can be usedin other ways as well. First, it can be used to confirm that themovement moving the electronic device occurred with the gravitydirection, i.e., downward, as would be the case when placing theelectronic device in a pocket, but not when raising the electronicdevice to the user's ear. Second, by comparing the acceleration to apredetermined threshold, the acceleration can be used to confirm that auser is actually placing the electronic device in a pocket rather thanperforming some other operation, such as waving the electronic devicearound. Other uses for the acceleration data will be obvious to those ofordinary skill in the art having the benefit of this disclosure.

The one or more processors can compare the movement to the gravitydirection. For example, in one embodiment the one or more processors candetermine whether at least some of the movement was against the gravitydirection. Similarly, in one embodiment the one or more processors candetermine whether a component of the gravity direction runs from a firstend of the electronic device to a second end of the electronic device.

At optional step 505, the one or more processors can further confirmthat the electronic device is in the pocket by determining whether anobject, such as clothing, textile materials, or other natural,synthetic, or blend layer is covering the electronic device. Thisdetermination can be made when the one or more processors receivesignals from the one or more proximity detector components indicatingthat an object, such as textile material, is less than a predefineddistance from a surface of the electronic device, thereby indicatingthat the electronic device is covered by the object. Where this occurs,the one or more processors can further confirm that the electronicdevice is disposed within the pocket. This detection of an objectcovering the electronic device can also serve as a confirmation that theelectronic device is not being touched as well.

Optional step 505 can additionally include determining, with a lightsensor, whether ambient or direct light is incident on the housing ofthe electronic device. Of course, when the electronic device is coveredby the pocket, ambient or direct light is generally not incident on thehousing. Sometimes, some of the housing is exposed from the pocket.However, in most situations the vast majority of the housing is situatedwithin the pocket. Modern light sensors are more than capable ofdetermining that the majority of the housing is covered. Accordingly, inone or more embodiments the determination that the electronic device isdisposed within the pocket can further include determining, with a lightsensor, that ambient or direct light is not incident on the housing.Again, that is the electronic device is determined to be in the pocketinstead of on another surface when tilts and small motions are detectedvia the accelerometer combined with the electronic device not beingtouched as determined by edge touch sensors.

The factors listed above can be used in the function of determiningwhether the electronic device is disposed within a pocket, at step 506,alone or in combination. For example, the function can consider one,two, three, or all of the factors. Considering more factors assists inpreventing false detection of the in-pocket condition. Embodiments ofthe disclosure contemplate that a user should be minimally affected dueto false detection. Accordingly, in one embodiment the one or moreprocessors consider all factors. However, subsets of the factors can beuseful in many applications.

The second method of FIG. 5 is simpler. In one or more embodiments, theelectronic device includes at least three touch sensors. A first touchsensor can be disposed on the front major face of the electronic device.A second touch sensor can be disposed on the rear major face of theelectronic device. A third touch sensor can be situated along one ormore of the minor faces defined by the sides of the electronic device.

At step 507, the second method detects touch of a human body on eitherthe front major face or the rear major face of the electronic device.For example, when the electronic device is stowed within a pocket, atouch sensor abutting the user's leg can detect the touch of a personfrom a combination of the contact and temperature of the person.

At step 508, the second method detects an absence of touch on the otherof the front major face or the rear major face. For example, when theelectronic device is stowed within a pocket, a touch sensor facing awayfrom the person will detect an absence of the touch of a person from acombination of contact and temperature.

At step 509, the second method detects an absence of touch on the minorfaces defined by the sides of the electronic device. Where there istouch detected on one major face, and an absence of touch detected onthe other major face and the minor faces defined by the sides of theelectronic device, in one or more embodiments the second methodconcludes that the device is stowed within a pocket at step 510.

While two methods of detecting an electronic device is in a repositorycontainer, such as a pocket, have been shown in FIG. 5, it should benoted that embodiments of the disclosure are not so limited. Othermethods of detecting an electronic device is in a repository container,such as a pocket will be obvious to those of ordinary skill in the arthaving the benefit of this disclosure, and can be substituted for themethods described with reference to FIG. 5.

Turning now back to FIG. 4, at step 402 the method 400 determines, withone or more processors, an audio signal adjustment function for one ormore audio transducers of the electronic device in response to theenclosed condition. As noted above, in one or more embodiments this step402 can be executed by performing an audio sweep. Turning briefly toFIG. 6, illustrated therein is one method of performing an audio sweep.

At step 601, one or more audio output devices of the electronic device100 delivers or reproduces a predefined acoustic output, which isreceived by one or more microphones of the electronic device.Illustrating by example, if each audio transducer 102,103,104,105 of theelectronic device 100 includes one audio output device and onemicrophone, step 601 can include each audio output device delivering thepredefined acoustic output to its corresponding microphone. At step 602,the one or more microphones receive the predefined acoustic outputdelivered by the audio output devices.

At step 603, one or more processors of the electronic device 100 canmeasure an attenuation of the predefined acoustic output occurringbetween the one or more audio output devices and the one or moremicrophones. In this example, audio transducers 102,105 are completelycovered by the pocket 115. Audio transducers 103 and 104 are exposedfrom the pocket 115. For this embodiment, presume that transducers 102and 103 are loudspeakers and transducers 104 and 105 are microphones.Accordingly, the signal produced by transducer 103 will arrive atmicrophone (transducer 104) without any additional attenuation, but willarrive at transducer 105 with more attenuation than it would if thedevice were not in the pocket 115. The signal produced by transducer 102will arrive at both transducer 104 and 105 attenuated, however theadditional attenuation will not be the same at both microphones. Thepath from transducer 102 to 105 would be affected by the surfaceabsorption of pocket 115, while the path from transducer 102 to 104would be affected by the transmission loss through the material ofpocket 115. The attenuation due to the pocket for each path is thedifference between the unimpeded free-space transfer function betweenthe pair of transducers (or reference transducer to transducer transferfunction) and the in-situ transfer function between that same pair oftransducers.

Based upon these measurements, the one or more processors can calculateor select the audio signal adjustment function at step 604. The audiosignal adjustment function includes response coefficients that, whenapplied to the one or more audio transducers 102,103,104,105, adjustgain and spectrum of the one or more audio transducers 102,103,104,105so that they are better able to receive and deliver acoustic energythrough the pocket 115. Embodiments of the disclosure contemplate thatpockets 115 are very restrictive environments for audio. Accordingly,the audio signal adjustment function determined at step 504 alters theaudio gain and transfer function due to the fact that at least somesound has to pass through the pocket material, resulting in level andspectral changes.

It should be noted that attenuation measured as transfer functions mayor may not be what is used to create the audio signal adjustmentfunction. Moreover, such transfer functions may not be used to select apredetermined signal adjustment function. Other information, such as theselection of a default audio signal adjustment function when, forexample, a light sensor (308) detects that the electronic device isdisposed within a pocket 115 may be applied to the one or more audiotransducers 102,103,104,105. Other techniques for creating and/orselecting the audio signal adjustment function will be obvious to thoseof ordinary skill in the art having the benefit of this disclosure.

Turning briefly to FIG. 10, illustrated therein is one example of anaudio signal adjustment function 116. In one embodiment, the audiosignal adjustment function 116 includes amplitude compensation 1001.Following pocket context detection, the application of the audio signaladjustment function increases microphone and speaker gain so thatcovered microphones and speakers may once again detect acoustic energyfrom the outside environment and communicate with the user acousticallyto overcome sound attenuation due to pocket.

In one embodiment, the audio signal adjustment function 116 alsoincludes spectral equalization 1002. After performing an audio sweepoccurring, an inverse function can be applied to obtain correctionfactors specific to clothes impacting audio “spectral function” if onetransducer is known to be inside of the pocket 115 and one is known tobe outside of the pocket 115. Such is the case with audio outputtransducer 103 and microphone (transducer 105). If both transducers aredetermined to be in the pocket 115, the transfer function between thetransducers will be used to find a predefined audio signal adjustmentfunction 116 associated with but not equal to that transfer functionThus, as shown in FIG. 10, in one or more embodiments the audio signaladjustment function 116 comprises one or more amplitude compensationcoefficients, found in the amplitude compensation 1001, and one or morespectral equalization coefficients, found in the spectral equalization1002.

Turning now back to FIG. 6, it should be noted that in one or moreembodiments of the disclosure, some audio transducers could simply beselected, while others are not. Embodiments of the disclosurecontemplate that a serious pocket issue caused by pocket placement isthe loud rubbing noise detected by microphones, which can overwhelmand/or saturate the microphone diaphragm, thereby preventing it frompicking up the lower outside audio sounds. In this illustration, themicrophones of audio transducers 102,105 would probably saturate in thismanner. In this illustration output transducer 103 and input transducer104 could be chosen since they are not impeded by pocket 115. In thatcase the audio signal adjustment function would be the same for thosetwo transducers as it is when a pocket 115 is not detected.

Embodiments of the disclosure contemplate that one way to deal with theloud rubbing sound is to adaptively select one of the multiplemicrophones that is least impacted by rubbing based on microphonelocation and phone orientation. In this example, the input transducer104 is not covered at all. Accordingly, in one or more embodiments theone or more processors of the electronic device 100 simply select themicrophone on the “up-side” of the electronic device 100, which is theinput transducer 104 in this example Even when partially covered, thismicrophone is more likely to be closer to a pocket opening. As such, itis less likely to be rubbing against material. In one or moreembodiments, a simple subroutine that looks for clipping on each channelis used to aid in the determination of the microphone with the leastamount of rubbing. In an alternative embodiment, high order harmonicsare measured to identify a rubbing sound on a particular microphonechannel.

As such, as shown in FIG. 6, in one or more embodiments the one or moreprocessors of the electronic device determine which microphone of theplurality of microphones receives a least amount of enclosure noise. Inthis example, it would be the microphone transducer 103. Once thisoccurs, in one or more embodiments the one or more processors select themicrophone receiving the least amount of enclosure noise to captureaudio input from an environment of the electronic device during theenclosed condition.

Turning now to FIG. 7, illustrated therein is an alternate method ofdetermining an audio signal adjustment function for one or more audiotransducers of the electronic device in response to the enclosedcondition. The method of FIG. 7 looks for a spectral difference in anambient noise estimate as detected by the audio input transducers. Saiddifferently, the method of FIG. 7 compares an estimated noise indexmeasured by the one or more microphones when the electronic device iswithin the repository container with another estimated noise indexmeasured by the one or more microphones when the electronic device isoutside the repository container.

At step 701, the electronic device estimates a noise spectrum from thesignals received from one or more microphones of the audio transducers.This can occur once, continually, or periodically while the electronicdevice is not in an enclosed condition. This can be stored in memory asa reference noise spectrum.

At step 702, the user places the electronic device in a pocket. Thisresults in the electronic device being in an enclosed condition. Whenthis occurs, at step 703, the electronic device can estimate a noisespectrum from the signals received from one or more microphones while inthe enclosed condition. At step 704, the electronic device can comparethe noise spectrum from step 703 to a reference noise spectrum from 701.The difference can become the audio signal adjustment function, or abasis thereof, at step 705. Once the in-pocket condition has beenconfirmed, the material of the container/pocket identified, and theappropriate audio signal adjustment has been applied to the transducers,additional noise spectral measurements can be used to help removerubbing noise from the microphone using known noise reductiontechniques.

A similar process can be used to determine whether the electronic deviceis in the enclosed condition. Turning now to FIG. 8, at step 801, theelectronic device estimates a noise spectrum from the signals receivedfrom one or more microphones of the audio transducers. This can occuronce, continually, or periodically while the electronic device is not inan enclosed condition. This can be stored in memory as a reference noisespectrum.

At step 802, the user places the electronic device in a pocket. At step703, the noise spectrum estimate procedure from step 801 can continue.Since the electronic device is in the enclosed condition, the noisespectrum from the signals received from one or more microphones while inthe enclosed condition will differ from the reference noise spectrum byat least a predefined criterion. Whether this is true can be determinedat decision 804 by comparing the noise spectrum to the reference noisespectrum. For example, the noise spectrum from the signals received fromone or more microphones while in the enclosed condition will differ fromthe reference noise spectrum by at least a predefined threshold. Wherethis is true, the electronic device can conclude that it is in anenclosed condition at step 805.

Turning now back to FIG. 4, once the audio signal adjustment isdetermined, the method 400 can optionally infer the container pocketmaterial at step 403. As noted above, in addition to being used todetermine the audio signal adjustment function, audio sweeps can be usedto determine in what type of repository container the electronic deviceis situated as well in some embodiments. One or more predefinedauthentication references can be stored in memory. The predefinedauthentication references can comprise representations of audio signalsreceived during audio sweeps in predefined conditions.

Data representations of conducted audio sweeps can be compared to theone or more predefined authentication references stored in a table inthe memory. If a sufficiently matching predefined authenticationreference is found, the one or more processors can conclude that thematerial associated with the sufficiently matching predefinedauthentication reference is the material of the enclosure. If thesufficiently matching predefined authentication reference corresponds toa denim pocket, for instance, the one or more processors can concludethat the electronic device is situated in a denim pocket, such as in apocket of a pair of blue jeans.

Thus, in one or more embodiments where the enclosed condition comprisesan in-pocket condition, the one or more processors can identify a pocketmaterial by referencing a table of predefined authentication referencescorresponding to a plurality of pocket materials, each having acorresponding predefined audio signal adjustment function. By comparingthe determined audio signal adjustment function to the table ofpredefined authentication references corresponding to a plurality ofpocket materials, the one or more processors can select a closestpredefined audio signal adjustment function from the table to identifythe material of the pocket. Where no sufficiently matching predefinedauthentication reference is found in the table in memory, theaudio/input processor or the one or more processors can create a newpredefined authentication reference, as described above.

At step 404, the method 400 can apply the audio signal adjustmentfunction to signals received from the one or more audio transducersduring the enclosed condition. This can occur as previously describedabove with reference to FIG. 1.

At optional step 404, a motion detector can detect motion. Embodimentsof the disclosure contemplate that changing environments can beassociated with device motion. Accordingly, in one or more embodimentsstep 404 comprises detecting, from the one or more sensors, motion ofthe electronic device. When this occurs, step 406 repeats the actions ofstep 402 and can determine a different audio signal adjustment function.This results in step 403 applying a different audio signal adjustmentfunction in response to the motion.

At step 407, the method 400 can detect, with the one or more sensors,cessation of the enclosed condition. This can occur, for example, when auser removes the electronic device from a pocket. Where this occurs,step 408 can comprise terminating application of the audio signaladjustment function to the signals received from the one or more audiotransducers.

Turning now to FIG. 9, illustrated therein is another method 900 inaccordance with one or more embodiments of the disclosure. At step 901,the method 900 monitors, with one or more processors, an estimated noiseindex occurring in signals received from one or more microphones of theelectronic device. At step 902, the method 900 detects, with the one ormore processors, when a change in the estimated noise index exceeds apredefined threshold, an in-container condition of the electronicdevice. This was described above with reference to FIG. 8. At step 903,the method applies, with the one or more processors, an audio signaladjustment function to the signals received from the one or moremicrophones to mitigate in-container noise and attenuation occurring inthe signals due to the in-container condition.

Turning now to FIG. 11, illustrated therein are various embodiments ofthe disclosure. At 1101, a method in an electronic device comprisesdetecting, with one or more sensors of the electronic device, anenclosed condition. At 1101, the method comprises determining, with oneor more processors, an audio signal adjustment function for one or moreaudio transducers of the electronic device in response to the enclosedcondition. At 1101, the method comprises applying, with the one or moreprocessors, the audio signal adjustment function to signals receivedfrom the one or more audio transducers during the enclosed condition.

At 1102, determination of the audio signal adjustment function at 1101comprises delivering, from one or more audio output devices, apredefined acoustic output to one or more microphones. At 1102,determination of the audio signal adjustment function at 1101 comprisesmeasuring, with the one or more processors, attenuation of thepredefined acoustic output occurring between the one or more audiooutput devices and the one or more microphones.

At 1103, determination of the audio signal adjustment function at 1101comprises estimating, with the one or more processors, a noise spectrumfrom the signals received from one or more microphones while in theenclosed condition. At 1103, determination of the audio signaladjustment function at 1101 comprises comparing the noise spectrum to areference noise spectrum stored within a memory of the electronicdevice. At 1104, the reference noise spectrum of 1103 comprises a noisespectrum estimate determined prior to the enclosed condition.

At 1105, detection of the enclosed condition of 1101 comprisesestimating, with the one or more processors, a noise spectrum from thesignals received from one or more microphones while in the enclosedcondition. At 1105, detection of the enclosed condition of 1101comprises comparing the noise spectrum to a reference noise spectrumstored within a memory of the electronic device. At 1105, detection ofthe enclosed condition of 1101 comprises determining that a differencebetween the reference noise spectrum and the noise spectrum exceeds atleast one predefined criterion.

At 1106, the enclosed condition of 1101 comprises an in-pocketcondition, further comprising identifying, with the one or moreprocessors, a pocket material by referencing a table comprising aplurality of pocket materials, each having a corresponding predefinedaudio signal adjustment function. At 1107, the method of 1106 furthercomprises selecting a closest predefined audio signal adjustmentfunction from the table, wherein the applying comprises applying theclosest predefined audio signal adjustment function to the signalsreceived from one or more microphones.

At 1108, the method of 1106 further comprises failing to find asufficiently matching predefined audio signal adjustment function in thetable. At 1108, the method of 1106 further comprises recording the audiosignal adjustment function in the table as a new audio signal adjustmentfunction.

At 1109, the method of 1101 further comprises also detecting, with theone or more sensors, cessation of the enclosed condition. At 1109, themethod of 1101 also comprises terminating application of the audiosignal adjustment function to the signals received from the one or moreaudio transducers.

At 1110, the method of 1101 further comprises detecting, with the one ormore sensors, motion of the electronic device. At 1110, the method of1101 further comprises repeating the determining the audio signaladjustment function and the applying the audio signal adjustmentfunction to the signals in response to detecting the motion.

At 1111, the one or more audio transducers of 1101 comprise a pluralityof microphones. At 1111, the method of 1101 further comprisesdetermining, with the one or more processors, which microphone of theplurality of microphones receives a least amount of enclosure noise. At1111, the method of 1101 further comprises selecting, with the one ormore processors, the microphone receiving the least amount of enclosurenoise to capture audio input from an environment of the electronicdevice during the enclosed condition.

At 1112, an electronic device comprises one or more microphones. At1112, the electronic device comprises one or more sensors. At 1112, theelectronic device comprises one or more processors operable with the oneor more microphones and the one or more sensors. At 1112, the one ormore processors, upon the one or more sensors detecting the electronicdevice is disposed within a repository container, apply an audio signaladjustment function to signals received from the one or moremicrophones, thereby mitigating noise in the signals caused by therepository container.

At 1113, the electronic device of 1112 further comprises one or moreaudio output devices. At 1113, the one or more processors determine theaudio signal adjustment function by measuring attenuation of apredefined acoustic output from the one or more audio output deviceswhen received by the one or more microphones.

At 1114, the one or more processors of 1112 determine the audio signaladjustment function by comparing an estimated noise index measured bythe one or more microphones when the electronic device is within therepository container with another estimated noise index measured by theone or more microphones when the electronic device is outside therepository container. At 1115, the audio signal adjustment function of1112 comprises one or more amplitude compensation coefficients and oneor more spectral equalization coefficients.

At 1116, the one or more processors of 1115 further detect, from the oneor more sensors, motion of the electronic device. At 1116, the one ormore processors of 1115 further apply a different audio signaladjustment function in response to the motion.

At 1117, the one or more sensors of 1112 detect the electronic device iswithin the repository container when a difference between an estimatednoise index measured by the one or more microphones when the electronicdevice is within the repository container, and another estimated noiseindex measured by the one or more microphones when the electronic deviceis outside the repository container, exceeds a predefine threshold. At1117, the one or more processors of 1112 determine the audio signaladjustment function by measuring attenuation of a predefined acousticoutput from the electronic device when received by the one or moremicrophones.

At 1118, a method in an electronic device comprises monitoring, with oneor more processors, an estimated noise index occurring in signalsreceived from one or more microphones of the electronic device. At 1118,the method comprises detecting, with the one or more processors, when achange in the estimated noise index exceeds a predefined threshold, anin-container condition of the electronic device. At 1118, the methodcomprises applying, with the one or more processors, an audio signaladjustment function to the signals received from the one or moremicrophones to mitigate in-container noise occurring in the signals dueto the in-container condition.

At 1119, the method of 1118 further comprises delivering, from one ormore audio output devices of the electronic device, a predefinedacoustic output to the one or more microphones, and measuring, with theone or more processors, attenuation of the predefined acoustic outputoccurring between the one or more audio output devices and the one ormore microphones to determine the audio signal adjustment function. At1120, the in-container condition of 1118 comprises an in-pocketcondition, further comprising identifying a pocket material of a pocketcausing the in-pocket condition.

In the foregoing specification, specific embodiments of the presentdisclosure have been described. However, one of ordinary skill in theart appreciates that various modifications and changes can be madewithout departing from the scope of the present disclosure as set forthin the claims below. Thus, while preferred embodiments of the disclosurehave been illustrated and described, it is clear that the disclosure isnot so limited. Numerous modifications, changes, variations,substitutions, and equivalents will occur to those skilled in the artwithout departing from the spirit and scope of the present disclosure asdefined by the following claims. Accordingly, the specification andfigures are to be regarded in an illustrative rather than a restrictivesense, and all such modifications are intended to be included within thescope of present disclosure. The benefits, advantages, solutions toproblems, and any element(s) that may cause any benefit, advantage, orsolution to occur or become more pronounced are not to be construed as acritical, required, or essential features or elements of any or all theclaims.

What is claimed is:
 1. A method in an electronic device, the methodcomprising: detecting, with one or more sensors of the electronicdevice, an enclosed condition; determining, with one or more processors,an audio signal adjustment function for one or more audio transducers ofthe electronic device in response to the enclosed condition, wherein theone or more audio transducers comprise a plurality of microphones;applying, with the one or more processors, the audio signal adjustmentfunction to signals received from, or delivered to, the one or moreaudio transducers during the enclosed condition; determining, with theone or more processors, which microphone of the plurality of microphonesreceives a least amount of enclosure noise; and selecting, with the oneor more processors, the microphone receiving the least amount ofenclosure noise to capture audio input from an environment of theelectronic device during the enclosed condition.
 2. The method of claim1, wherein the determining the audio signal adjustment functioncomprises: delivering, from one or more audio output devices, apredefined acoustic output to the one or more microphones; andmeasuring, with the one or more processors, attenuation of thepredefined acoustic output occurring between the one or more audiooutput devices and the one or more microphones.
 3. The method of claim1, wherein the determining the audio signal adjustment functioncomprises: estimating, with the one or more processors, a noise spectrumfrom the signals received from the one or more microphones while in theenclosed condition; and comparing the noise spectrum to a referencenoise spectrum stored within a memory of the electronic device.
 4. Themethod of claim 3, wherein the reference noise spectrum comprises anoise spectrum estimate determined prior to the enclosed condition. 5.The method of claim 1, wherein the detecting the enclosed conditioncomprises: estimating, with the one or more processors, a noise spectrumfrom the signals received from the one or more microphones while in theenclosed condition; comparing the noise spectrum to a reference noisespectrum stored within a memory of the electronic device; anddetermining that a difference between the reference noise spectrum andthe noise spectrum exceeds at least one predefined criterion.
 6. Themethod of claim 1, wherein the enclosed condition comprises an in-pocketcondition, further comprising identifying, with the one or moreprocessors, a pocket material by referencing a table comprising aplurality of pocket materials, each having a corresponding predefinedaudio signal adjustment function.
 7. The method of claim 6, furthercomprising selecting a closest predefined audio signal adjustmentfunction from the table, wherein the applying comprises applying theclosest predefined audio signal adjustment function to the signalsreceived from one or more microphones.
 8. The method of claim 6, furthercomprising: failing to find a sufficiently matching predefined audiosignal adjustment function in the table; and recording the audio signaladjustment function in the table as a new audio signal adjustmentfunction.
 9. The method of claim 1, further comprising: also detecting,with the one or more sensors, cessation of the enclosed condition; andterminating application of the audio signal adjustment function to thesignals received from the one or more audio transducers.
 10. The methodof claim 1, further comprising: detecting, with the one or more sensors,motion of the electronic device; and repeating the determining the audiosignal adjustment function and the applying the audio signal adjustmentfunction to the signals in response to detecting the motion.
 11. Themethod of claim 1, wherein the audio signal adjustment function adjustsone or more of a volume of the signals, a gain of the signals, or aspectral distribution of the signals.
 12. An electronic device,comprising: one or more microphones; one or more loudspeakers; one ormore sensors; and one or more processors operable with the one or moremicrophones and the one or more sensors; the one or more processors,upon the one or more sensors detecting the electronic device is disposedwithin a repository container, applying an audio signal adjustmentfunction to one of signals received from the one or more microphones ordelivered to the one or more loudspeakers, thereby mitigating noise inthe signals caused by the repository container; and the one or moreprocessors determining the audio signal adjustment function by comparingan estimated noise index measured by the one or more microphones whenthe electronic device is within the repository container with anotherestimated noise index measured by the one or more microphones when theelectronic device is outside the repository container.
 13. Theelectronic device of claim 12, the one or more processors furtherdetermining the audio signal adjustment function by measuringattenuation of a predefined acoustic output from the one or moreloudspeakers when received by the one or more microphones.
 14. Theelectronic device of claim 12, wherein the repository containercomprises a pocket.
 15. The electronic device of claim 12, the audiosignal adjustment function comprising one or more amplitude compensationcoefficients and one or more spectral equalization coefficients.
 16. Theelectronic device of claim 15, the one or more processors further:detecting, from the one or more sensors, motion of the electronicdevice; and applying a different audio signal adjustment function inresponse to the motion.
 17. The electronic device of claim 12: the oneor more sensors detecting the electronic device is within the repositorycontainer when the estimated noise index measured by the one or moremicrophones when the electronic device is within the repositorycontainer and the another estimated noise index measured by the one ormore microphones when the electronic device is outside the repositorycontainer exceeds a predefine threshold.
 18. A method in an electronicdevice, the method comprising: monitoring, with one or more processors,an estimated noise index occurring in signals received from one or moremicrophones of the electronic device; detecting, with the one or moreprocessors, when a change in the estimated noise index exceeds apredefined threshold, an in-container condition of the electronicdevice; and applying, with the one or more processors, an audio signaladjustment function to one of the signals received from the one or moremicrophones or other signals delivered to one or more audio outputdevices to mitigate in-container noise occurring due to the in-containercondition; wherein the in-container condition comprises an in-pocketcondition, further comprising identifying a pocket material of a pocketcausing the in-pocket condition.
 19. The method of claim 18, furthercomprising delivering, from the one or more audio output devices of theelectronic device, a predefined acoustic output to the one or moremicrophones, and measuring, with the one or more processors, attenuationof the predefined acoustic output occurring between the one or moreaudio output devices and the one or more microphones to determine theaudio signal adjustment function.
 20. The method of claim 18, whereinthe audio signal adjustment function corrects one or more of amplitudedegradation of the signals or spectral degradation of the signalsresulting from the in-container condition.